Vibrational spectroscopic studies of metal(II) halide benzimidazole

Yurdakul, Şenay; Kurt, Mustafa

doi:10.1016/s0022-2860(03)00153-4

Cited by 56 publications

(19 citation statements)

References 38 publications

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“…The shift of all bands of the complex is attributed to the contributions which the ligand was coordinated with Eu(III) ion. In the present complex, a medium and/or weak band is observed at 618 cm À1 , which can be attributed to the n (Eu-N) modes [11]. In addition, the molar conductance value of the complex in DMSO solutions (10 À4 M) is 31 cm 2 O À1 mol À1 , which is lower than the reported range for electrolytes in DMSO [12], The result is consistent with the lightelectrolytes nature of the complex.…”

Section: Ft-ir Spectrasupporting

confidence: 82%

Synthesis and photophysical properties of novel polymeric Eu(III) complex with bicoordination ligand

Huang

Zhong

Zhang

et al. 2008

Journal of Luminescence

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Section: Ft-ir Spectrasupporting

confidence: 82%

Synthesis and photophysical properties of novel polymeric Eu(III) complex with bicoordination ligand

Huang

Zhong

Zhang

et al. 2008

Journal of Luminescence

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“…The t C=N coupled with t C=C of the phenylene rings was observed at 1612 cm -1 . The assignments of the other bands along with the spectral data which have not been reported earlier of the related quinazoline derivatives, II-V are listed in Table 2 [30]. The UV-Vis spectrum of I exhibited absorption bands assignable to p !…”

Section: Resultsmentioning

confidence: 84%

Synthesis, Characterization and Biological Activity Studies on 6-p-Dimethylaminophenyl-5,6-dihydrobenzoimidazo[1,2-c]quinazoline: Crystal Structure of the Title Compound and Comparative Study with Related Derivatives

et al. 2011

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Reaction of o-aminophenylbenzimidazole with p-dimethylaminobenzaldehyde yielded 6-p-dimethylaminophenyl-5,6-dihydrobenzoimidazo[1,2-c]quinazoline, which was characterized by elemental analysis, IR, UV-Vis, 1 H NMR, 13 C NMR, mass spectral studies and X-ray crystal structure analysis. Studies on the antimicrobial activity of the compound revealed that it is active against fungus Yeast but not Bacillus subtilis. The compound crystallized in the space group P2 1 /n with the unit cell parameters a = 10.652(2) Å , b = 11.002(2) Å , c = 15.753(2) Å , b = 109.29(2)°and the structure was refined to an R-factor of 0.0479. The hydropyrimidine ring in the quinazoline moiety is in skew-boat conformation. The dimethylamino group attached to phenyl ring is in conjugation with it. The structure was stabilized by intermolecular C-H-N interactions. A few of the related quinazolines (6-p-hydroxyphenyl-5,6-dihydrobenzoimidazo [1,2-c]quinazoline; 6-phenyl-5,6-dihydrobenzoimidazo[1,2-c]quinazoline; 6-pyridyl-5,6-dihydrobenzoimidazo[1,2-c]quinazoline; 6-furyl-5,6-dihydrobenzoimidazo[1,2-c]quinazoline) were also examined for their biological activity, in addition to their characterization by IR, UV-Vis, 1 H and 13 C NMR spectral studies along with structural comparison.

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“…Analytical grade copper nitrate, zinc nitrate, ethylbenzene, benzoin, benzimidazole and tertbutylhydroperoxide (TBHP) were purchased from Merck and used as such. The neat Ru(III), Cu(II) and Zn(II) complexes of benzimidazole (BzlH) were synthesized as per the literature methods [26,27].…”

Section: Methodsmentioning

confidence: 99%

Zeolite encapsulated Ru(III), Cu(II) and Zn(II) complexes of benzimidazole as reusable catalysts for the oxidation of organic substrates

Bhagya

Gayathri

2013

J Porous Mater

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Ru(III), Cu(II) and Zn(II) complexes of benzimidazole (BzlH) have been synthesized in the supercages of zeolite-Y by the flexible ligand method and were characterized by spectroscopic (IR, UV-Vis and ESR) studies, XRD and thermogravimetric analysis, surface area, and pore volume measurements. The zeolite encapsulated complexes catalyzed the oxidation of ethylbenzene, benzoin, and cyclohexanol. Various parameters, such as concentration of oxidant and catalyst, reaction time, temperature of the reaction and type of solvents have been optimized to obtain the maximum transformation of ethylbenzene to a mixture of acetophenone, benzaldehyde and styrene. Under the optimized reaction conditions, [Ru(BzlH)]-Y gave 80.4 % conversion of ethylbenzene in 1 h. All these zeolite encapsulated complexes were more selective towards acetophenone formation. Oxidation of benzoin catalyzed by [Cu(BzlH)]-Y, [Ru(BzlH)]-Y and [Zn(BzlH)]-Y encapsulated complexes resulted in 75.5, 78.7 and 59.9 % conversion respectively to give benzaldehyde as exclusive product. A maximum conversion of 39.1 % cyclohexanol with [Cu(BzlH)]-Y was achieved to give cyclohexanone. The activity of neat complexes towards these reactions was also carried out. The encapsulated catalysts were significantly more active than neat complexes and recyclable without much loss in catalytic activity.

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Vibrational spectroscopic studies of metal(II) halide benzimidazole

Cited by 56 publications

References 38 publications

Synthesis and photophysical properties of novel polymeric Eu(III) complex with bicoordination ligand

Synthesis and photophysical properties of novel polymeric Eu(III) complex with bicoordination ligand

Synthesis, Characterization and Biological Activity Studies on 6-p-Dimethylaminophenyl-5,6-dihydrobenzoimidazo[1,2-c]quinazoline: Crystal Structure of the Title Compound and Comparative Study with Related Derivatives

Zeolite encapsulated Ru(III), Cu(II) and Zn(II) complexes of benzimidazole as reusable catalysts for the oxidation of organic substrates

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